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GB1489282A - Method for coating particulate material upon a viewing-window surface of a cathode-ray tube - Google Patents

Method for coating particulate material upon a viewing-window surface of a cathode-ray tube

Info

Publication number
GB1489282A
GB1489282A GB12392/75A GB1239275A GB1489282A GB 1489282 A GB1489282 A GB 1489282A GB 12392/75 A GB12392/75 A GB 12392/75A GB 1239275 A GB1239275 A GB 1239275A GB 1489282 A GB1489282 A GB 1489282A
Authority
GB
United Kingdom
Prior art keywords
slurry
faceplate
excess
coating
phosphor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB12392/75A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Publication of GB1489282A publication Critical patent/GB1489282A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/227—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines
    • H01J9/2277—Applying luminescent coatings with luminescent material discontinuously arranged, e.g. in dots or lines by other processes, e.g. serigraphy, decalcomania

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Luminescent Compositions (AREA)

Abstract

1489282 Colour television tubes RCA CORPORATION 25 March 1975 [28 March 1974] 12392/75 Heading H1D A method of coating a CRT faceplate comprises applying a phosphor slurry at less than 22‹ C. to the face plate at more than 35‹ C., recovering and recycling excess slurry and removing heat added to the excess to maintain the temperature of the applied slurry constant. The method results in thicker denser coatings and allows less binder and filler to be used. For red, blue and green phosphor slurries used with colour CRT's the weight ratio of PVA to phosphor 0À09 to 0À12 and of filler to PVA 0À05. Slurry at 17-22‹ C. is deposited on a faceplate at 46Œ2‹ C. at the centre and 42Œ2‹ C. at its edges. The faceplate is tilted and rotated to spread the slurry. After coating the faceplate is spun rapidly to sling off excess slurry which is returned to a storage container. Excess heat is removed by cooling the slurry, in the container or immediately before dispensing.
GB12392/75A 1974-03-28 1975-03-25 Method for coating particulate material upon a viewing-window surface of a cathode-ray tube Expired GB1489282A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/455,835 US4078095A (en) 1974-03-28 1974-03-28 Slurry process for coating particles upon the viewing-window surface of a cathode-ray tube

Publications (1)

Publication Number Publication Date
GB1489282A true GB1489282A (en) 1977-10-19

Family

ID=23810459

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12392/75A Expired GB1489282A (en) 1974-03-28 1975-03-25 Method for coating particulate material upon a viewing-window surface of a cathode-ray tube

Country Status (10)

Country Link
US (1) US4078095A (en)
JP (1) JPS5628341B2 (en)
BE (1) BE826940A (en)
CA (1) CA1041379A (en)
DE (1) DE2513907B2 (en)
ES (1) ES435853A1 (en)
FR (1) FR2266293B1 (en)
GB (1) GB1489282A (en)
IT (1) IT1034490B (en)
NL (1) NL7503739A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225157A (en) * 1988-10-29 1990-05-23 Samsung Electronic Devices Cathode ray tube screen manufacture

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2904673A1 (en) * 1979-02-08 1980-08-14 Standard Elektrik Lorenz Ag SHIELDING PROCESS FOR COLOR TUBES
US4254160A (en) * 1979-12-17 1981-03-03 Rca Corporation Method for slurry coating a faceplate panel having a peripheral sidewall
JP2695823B2 (en) * 1987-04-10 1998-01-14 株式会社東芝 Method for forming a thin film on the outer surface of the display surface of a cathode ray tube
US5086297A (en) * 1988-06-14 1992-02-04 Dai Nippon Insatsu Kabushiki Kaisha Plasma display panel and method of forming fluorescent screen thereof
JPH04137436A (en) * 1990-09-28 1992-05-12 Sony Corp Manufacture of cathode-ray tube
CN1093783C (en) * 1996-02-21 2002-11-06 松下电器产业株式会社 Liquid application nozzle, method of manufacturing same, liquid application method, liquid application device, and method of manufacturing cathode-ray tube
US6103297A (en) * 1998-01-14 2000-08-15 Matsushita Electronics Corporation Method of manufacturing cathode-ray tube

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3269838A (en) * 1963-03-18 1966-08-30 Rca Corp Method of making luminescent screens for cathode ray tubes
US3364054A (en) * 1963-10-14 1968-01-16 Rca Corp Method of salvaging phosphor slurry in a spin coating process for making phosphor screens for cathode ray tubes
US3376153A (en) * 1964-10-20 1968-04-02 Rauland Corp Method of coating cathode-ray tubes
US3467059A (en) * 1966-07-11 1969-09-16 Westinghouse Electric Corp Method and apparatus for applying a fluid coating
US3635751A (en) * 1969-04-03 1972-01-18 Rca Corp Lithium silicate glare-reducing coating and method of fabrication on a glass surface
US3672932A (en) * 1969-06-24 1972-06-27 Rca Corp Process for screening cathode ray tubes including salvaging of excess phosphor slurry
US3652323A (en) * 1969-12-22 1972-03-28 Rca Corp Process for coating flatlike surfaces
US3653939A (en) * 1970-01-05 1972-04-04 Zenith Radio Corp Screening of black-surround color picture tubes
US3700444A (en) * 1970-02-10 1972-10-24 Sylvania Electric Prod Method of forming a cathode ray tube screen
US3653941A (en) * 1970-03-02 1972-04-04 Rca Corp Slurry process for coating particulate material upon a surface
NL7018154A (en) * 1970-12-12 1972-06-14
US3703401A (en) * 1970-12-28 1972-11-21 Rca Corp Method for preparing the viewing-screen structure of a cathode-ray tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225157A (en) * 1988-10-29 1990-05-23 Samsung Electronic Devices Cathode ray tube screen manufacture

Also Published As

Publication number Publication date
CA1041379A (en) 1978-10-31
BE826940A (en) 1975-07-16
JPS5628341B2 (en) 1981-07-01
AU7948175A (en) 1976-10-14
JPS50134363A (en) 1975-10-24
DE2513907A1 (en) 1975-10-09
FR2266293B1 (en) 1979-01-05
IT1034490B (en) 1979-09-10
US4078095A (en) 1978-03-07
ES435853A1 (en) 1976-11-16
DE2513907B2 (en) 1977-08-11
FR2266293A1 (en) 1975-10-24
NL7503739A (en) 1975-09-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19950324